Steam-blower.



V No. 715,255.

v Patent ad 1m. 9, I902. E. GIBSDN.

' STEAM BLOWER.

(Applicaticn filed Hat. 7, 1902.)

(Ila Model.)

WlTNESSES m: scams PUERS co PHOfO-LITHD. WASHINGTON o. c.

UNITED STATES PATENT EDWARDGIBSON, OF JERSEY CITY, NEW JERSEY.

STEAM-BLOWER.

SPECIFICATION forming part of Letters Patent No. 715,255, dated December9, 1902.

Application filed March '7, 1902. Serial N10. 97,089. (No model.)

To (Z5 whom, it perry concern-.-

Be it known that I, EDWARD GIBSON, a citizen of the United States,residing in Jersey City, in the county of Hudsomin the State of NewJersey, have invented a certain new and usefullmprovement inSteam-Blowers, of which the following is a specification.

The improvement applies to all that class of blowers in which steam orother fluid at I steam-boiler furnace.

My blowing device is made to correspond to an aperture into which it isintroduced in the front or in any other portion of the furnace (I willshow it as a side) and supplied with steam from the boiler.

It has been before proposed to introduce a pipe coiled in what might becalled a tapering helix, technically a snail form, with a liberalconnection to the boiler to supply steam to the large end and a line ofperforations in the snail allowing jets of steam to escape insubstantially parallel directions, the air being received freely fromthe exterior of the furnace-wall and caused by the action of these jetsto move inward through the space in the wall not occupied by the snailand maintain a sufficiently-increased pressure in the ash-pit toproperly supply and stimulate the fire. It is difficult with such deviceto supply the steam at the proper high pressure at the inner end of thesnail. The escape of the steam through the apertures near the large endreduces the pressure. If the pipe is made of large diameter, the pipeitself be comes an obstruction to the free flow of the air. I havediscovered that it is possible to attain a form of apparatus in whichthe same arrangement of the jets is realized, thereby securing the sameapproximately even distribution of the action over the whole area of theaperture in the wall with freer provision for theflow of steam to theinner and smaller end of the apparatus and without any seriousobstruction of the movement of the air. I

have embodied such form in a practical construction, which will be setforth below. In brief, I supply a reservoir of tapering annular formproperly arranged, which gives liberal space for the flow of the steamand allows the jets to deliver with equal force from all the apertureswithout appreciably obstructing the air. In the form shown, which Iesteem preferable, the jets are delivered from a spiral offset in thegenerally tapering exterior.-

The following is a description of what I consider the best means ofcarrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a side elevation of my blower with a vertical section of theadjacent wall. Fig. 2 is an end view of my device seen from the left inFig. 1. Fig. 3 is a central vertical section through the principalportions with a slight modification. Fig. 4: is on a smaller scale. Itis a general side elevation of an ashpit and furnace and a portion of aboiler with my blower attached.

The drawings showthe novel parts with so much of the ordinary parts asis necessary to indicate their relation thereto.

Similar letters of reference indicate corresponding parts in all thefigures Where they appear.

A is the wall, having a circular aperture a, of such area as to allowthe entrance of sufficient air under the impulse of the jets onlyslightly obstructed by the presence of my blowing device.

0 is a pipe bringing steam from the boiler B through a series ofconvolutions 0, immersed in the hot gases escaping from the furnace.This pipe, controlled by a valve Chsupplies superheated steam to myblower, the main body of which is approximately two hollow cones withhigh-pressure steam between.

I will use the letter M to designate the main body of the blower, withsupernumerals, as M M distinguishing certain portions thereof. The wholeis preferably in a single casting of iron. M is a generally conicalinterior part,M the outer junction,and M a corresponding but muchsmaller inner junction. The exterior part is composed of awindingoffset, which I will sometimes refer to as a way M and connectingmetal M In the offset M are holes m, in which are tightly set nozzles N.The steam escaping through these nozzles produces the desired action onthe air, with the result to carry a strong flow of mingled steam and airinto the space below the grate, from whence it is distributed to thefire in any ordinary or suitable manner.

The greatest diameter of my casting is so much less than that of thehole a that air is allowed to flow through the annular space. Aconsiderable orifice m at the inner end allows air to be also deliveredthere. A series of tubes P, which may be each a short length of gas-pipeof sufficient size, allow the air to flow outward from the conical spacein the interior to the space outside of the device between it and thelining metal A of the wallaperture a.

A pipe D, connected to the lowest point in my casting M, leads away thewater of condensation. This may be done through any ordinary form ofsteam-trap (not shown) orit may be regulated by hand at intervals by thestop-cock D. It is important to allow the water to escape and at thesame time to avoid any waste of steam.

Modifications may be made without departing from the principle orsacrificing the advantages of the invention. I prefer to make the entirecasing M in a single casting, but it may succeed in many pieces ofdifferent materials. The space between the inner truncated cone M andthe outer oli'set portion M M may be greater or it may be somewhat lessthan shown.

The pipes P,which carry the air across from the space interior to thatexterior of the whole, may be larger or smaller or they may be greateror less in number. I prefer to arrange these as indicated in theelevation Fig. 1,so that the several lines of nozzlesN and thecorresponding steam-jets W issuing therefrom range between the lines ofair-pipes P; but this may be varied. Some may prefer to set themjoggled. They may be set irregularly. Fig. 2 shows them thus set. I can,if preferred, have each series of pipes P in the plane of a series ofnozzles N. Such is the slight modification shown in Fig. 3.

There may be two or more of my blowers in one furnace and even in onewall of a furnace. In such case they may be simply duplicates of the onehere shown, with duplicate connections for maintaining the pressure ofsteam therein and for allowing the escape of the condensed water.

The bends or convolutions C for superheating the steam may be omitted,and the steam may be brought in as direct a line as practicable from theboiler to the casing M, the drain-passage D, with its controlling meansD, providing for the discharge of any entrained water which the steammay bring from the boiler and also for any condensation which takesplace from the current of cold air bathing and moving actively past theblower.

I claim as my invention 1. A steam-blower having two tapering shells ortubes one within the other with a liberal space between, the outer shellbeing provided with small orifices so arranged as to direct jets ofsteam toward the small end in lines nearly parallel to the axis, andmeans for supplying steam to the space between the shells, allsubstantially as herein specified.

2. A steam-blower having two tapering shells or tubes one within theother with a liberal space between, the outer shell being provided withsmall orifices and nozzles on such orifices so arranged as to directjets of steam toward the small end in lines nearly parallel to the axis,and means for supplying steam to the space between the shells, allsubstantially as herein specified.

3. A steam-blower having two tapering shells or tubes one within theother, with a liberal space between, the outer shell being provided.with small orifices distributed on the exterior and nozzles on suchorifices, so arranged as to direct escaping jets of steam toward thesmall end in lines nearly parallel to the axis, a series of short tubesor thimbles nearly radial in the space, between the shells, and meansfor supplying steam to such space, all arranged to serve substantiallyas herein specified.

4. A steam blower having two tapering shells or tubes one within theother with a liberal space between, the outer shell being provided withsmall orifices distributed on the exterior arranged to direct escapingjets of steam toward the small end in lines nearly parallel to the axisand nozzles on such orifices, a series of short tubes or thimbles nearlyradial in the space between the shells and means for supplying steam tosuch space, and a drain-pipe D with controlling means D, all arranged toserve substantially as herein specified.

5. A steam-blower having two tapering shells or tubes one within theother cast integral with a liberal space between, ofisets M on theexterior shell M the orifices m and nozzles N in such offsets, aconnection for supplying steam to the space between the shells, andprovisions for separating water in such blower and discharging itthrough the drain-pipe D with controlling means D, arranged in anaperture Ct in the wall A so as to serve with a steam-boiler B,substantially as herein specified.

In testimony that I claim the invention above set forth I afiix mysignature in presence of two witnesses.

EDWARD GIBSON.

Witnesses:

J. B. OLAUTIOE, M. F. BOYLE.

